A new paper this month proposed that Tabby’s Star, the odd flickering object that has puzzled astronomers for more than a decade, may be dimming because a giant planet is grinding away at a hot dust cloud in its orbit. It is not a final answer, but it moves a long-running mystery one step forward. News like that has a familiar side effect. People walk outside after dinner, look up, and wonder what they are looking at.
We spent a few clear nights this summer testing the Android apps that answer that question. Eight made the shortlist, ranging from casual point-and-name tools to serious planetariums with telescope control. We tested outdoors on Android 15, with a mix of a Pixel 8, a Samsung Galaxy S24, and an older Xiaomi handset with a rough compass. The goal was to see which apps identify stars when you hold the camera up, which help plan an observation session, and which reliably track the International Space Station overhead.
What to look for in a stargazing app
The basics are camera-based augmented reality that labels stars, planets, and constellations as you sweep the phone across the sky. A red night mode matters more than most people expect, because it preserves the dark adaptation of your eyes after twenty minutes outside. An offline sky database is worth checking for too, because good stargazing rarely happens near strong mobile signal.
Beyond the basics, the apps we liked most did four things well. They predicted satellite passes for the ISS and Starlink trains with clear timing. They carried a deep-sky catalog wide enough to find galaxies and clusters, not just the eight planets. They pushed timely alerts for meteor showers and rare transits without turning into notification spam. And they calibrated cleanly against phone compass errors, which is the single biggest source of frustration on cheaper handsets.
We also watched for dark patterns. A few apps show a paywall the second you tap on Saturn, which is a fast way to get uninstalled.
Quick comparison
| App | Best for | Platforms | Free plan | Starting price | Rating |
|---|---|---|---|---|---|
| SkyView Lite | Free AR beginner pick | Android, iOS | Yes | ~$2 one-time upgrade | 4.6 |
| Stellarium Mobile | Planetarium accuracy and deep-sky catalog | Android, iOS | Yes | ~$14 one-time (Plus) | 4.5 |
| Star Walk 2 | Paid AR polish with beautiful visuals | Android, iOS | Yes | ~$3 one-time (Plus) | 4.6 |
| SkySafari | Serious amateurs with telescope control | Android, iOS | Yes | ~$15 to ~$45 one-time | 4.4 |
| Sky Map | Open-source barebones AR sky map | Android | Free, open source | Free | 4.4 |
| Heavens Above | ISS and satellite tracking | Android, web | Yes | Free | 4.6 |
| Nightshift | AI-assisted observation planning | Android, iOS | Yes | ~$5/mo (Premium) | 4.5 |
| Sky Tonight | Today-focused event feed | Android, iOS | Yes | ~$5/mo (Premium) | 4.5 |
The apps
1. SkyView Lite, best free AR beginner pick
SkyView Lite is the app we hand to anyone asking where to start. Point the phone at any patch of sky and it names the stars, constellations, and planets in the frame, with a smooth AR overlay that does not need a mobile signal to run. The free tier is generous enough to cover a full evening outside without hitting a paywall.
The Lite version limits some deep-sky targets and history features, which sit behind a small one-time upgrade in the full SkyView app. For most casual users the free tier is enough. Calibration held up well on our two flagship phones, and the app has a night mode that shifts the whole interface red to protect dark vision.
2. Stellarium Mobile, best planetarium accuracy with a deep-sky catalog
Stellarium is the mobile port of the desktop planetarium that professionals actually keep on their laptops. The free Android build ships with the essential star and planet catalog, and the Plus upgrade opens up millions of stars and hundreds of thousands of deep-sky objects. If you want to find a specific galaxy in Virgo tonight, this is the one.
The interface leans planetarium first and AR second. You can hold the phone up and match the sky, but the app really shines when you sit down, browse the catalog, and plan what to look for before you go outside. Time controls let you fast-forward the sky to check when a target will clear the horizon.
3. Star Walk 2, best paid AR polish
Star Walk 2 has been the pretty option in this category for years, and the 2026 version still looks the part. The AR view is smooth, the constellation artwork is worth looking at, and the interface is welcoming for a first-time user who wants to learn a little rather than run a session. It is the app to hand a curious teenager.
The free tier is enough to get started, with occasional interstitial ads and a Plus upgrade that unlocks a wider deep-sky catalog and satellite tracking. We saw a couple of ads during a testing session, none of them at moments that broke the experience. Calibration was reliable on both Pixel and Samsung hardware.
4. SkySafari, best for serious amateur astronomers
SkySafari is where hobbyists who own a telescope end up. It ships in three tiers, and the higher tiers add features that only make sense if you are pointing real optics at the sky: Bluetooth or Wi-Fi telescope control, precision object positioning, and observation logging. The base level is still a strong sky map on its own.
We tested the mid tier during a session with a Dobsonian. Pushing a slew command from the phone to the mount worked without fuss, and the object database is deep enough that you rarely search for something and come away empty. New users will find the interface denser than Star Walk 2, which is the trade-off for the extra power.
5. Sky Map, best open-source barebones AR sky map
Sky Map started life at Google, then became a community project on GitHub. It is free, small, ad-free, and has no in-app purchases at all. If you distrust the freemium model on principle, or want something for a kid’s phone that will never nag them for money, this is the pick.
The trade-off is age. The interface has not changed much in years, satellite tracking is thin, and the deep-sky catalog is basic. For pointing at Orion and knowing that is Betelgeuse, it works fine. It is also the smallest download of the eight, which is useful on older devices with tight storage.
6. Heavens Above, best for satellite passes and ISS tracking
Heavens Above is not a sky map. It is a satellite predictor built by people who spend their lives tracking things in orbit, and it is the app to install if the reason you look up is to watch the ISS drift overhead. Enter your location and it tells you when the station will pass, how bright, and where in the sky to look.
The Starlink train predictions are the standout feature this year. With hundreds of launches, the timing of a bright chain of satellites can catch you by surprise, and Heavens Above surfaces the good passes without extra work. The interface is functional rather than pretty. Pair it with SkyView Lite for a full toolkit.
7. Nightshift, best AI-assisted observation planning
Nightshift is the newer entry on the list, built around the idea that you should spend less time choosing a target and more time looking at it. Enter your location, gear, and how long you have, and the app builds an observation list ranked by what will actually look good tonight. Cloud cover, moon phase, and light pollution feed the recommendation.
The AI planner is the reason to try Nightshift. It suggests targets you might not have thought of, and explains why in plain language. The free tier is usable, and Premium unlocks longer plans and integration with a small watch companion for wrist-glance updates. The trade-off is a smaller catalog than Stellarium.
8. Sky Tonight, best today-focused event feed
Sky Tonight comes from the same studio as Star Walk 2, but takes a different approach. The home screen answers the question “what is happening tonight”. You see the moon phase, visible planets, upcoming meteor showers, and satellite passes in one scrollable feed, without opening a sky map first.
For casual watchers who look up a few times a month, that framing works better than a full planetarium. When something catches your eye in the feed, tap through and the AR view opens on that object. Premium adds custom alerts and a wider catalog of comets and asteroids for people who want to track specific events across weeks.
How to pick the right one
If you have never used one of these, start with SkyView Lite. It is free, it works the moment you hold the phone up, and it will not overload you. Most people who ask us what to download stop here and are perfectly happy.
If you want to plan a session before you go outside, get Stellarium Mobile. The desktop-grade catalog and time controls are worth the small download, and the Plus upgrade is a one-time payment that keeps working for years. Pair it with Star Walk 2 if you also want a prettier AR view for guests.
If your goal is satellites and the ISS, install Heavens Above alongside one of the AR apps. It has no rival for pass timing. If you own a telescope, jump straight to SkySafari and skip the middle ground.
If you look up occasionally and want the app to nudge you when something is worth seeing, Sky Tonight is the right choice. If you have a smartwatch and want the phone to do more of the planning for you, try Nightshift Premium for a month.
FAQ
What is the best free stargazing app?
SkyView Lite is the best free pick for most people, with a smooth AR view and no paywall in the way. If you want deeper catalog data at no cost, Stellarium Mobile’s free tier is stronger. Sky Map is the fully open-source option.
Which app is best for identifying stars with a phone camera?
Any of SkyView Lite, Star Walk 2, and Stellarium Mobile hold up well with the phone camera in AR mode. On modern flagships the labels line up cleanly within a second or two. On older handsets with weaker compasses, calibrate the phone in a figure-of-eight motion before starting.
Can any Android app track the ISS?
Yes. Heavens Above is the most reliable for ISS and Starlink passes, with clear timings and sky charts. Star Walk 2 and Sky Tonight also show ISS passes inside their AR views once you enable satellite tracking. Most apps also support push alerts for the next visible pass.
Which stargazing app works offline?
All of the AR apps on this list run offline once the sky database is on the device. Stellarium Mobile and SkySafari carry the largest offline catalogs. Heavens Above needs a periodic connection to refresh satellite orbital elements, since those data change often.
Is Stellarium Mobile Free good enough?
For most casual and intermediate users, yes. The free tier covers the stars, planets, and constellations you will actually look for, plus solid time controls. The Plus upgrade is worth it if you plan to hunt deep-sky objects or run planned sessions with a telescope.
Do these apps drain the battery?
AR sky views use the camera, GPS, and compass at the same time, which is heavy. Turn on the night mode and dim the screen to stretch a session past an hour. Sky Tonight and Heavens Above are lighter because they do not depend on the camera being active.
